Lifting device of mower cutter-bars.



APPLICATION FILED SEPT. 20, 1909.

Patented Nov. 4, 1913.

2 SHEET SSHEET 1.

INVENTORS' A TTO NEY.

WITNESSES:

L. M. JONES & R. H. VERITY.

LIFTING DEVICE OF MOWER CUTTER BARS.

APPLICATION FILED SEPT. 20, 1909.

1,077,351 Patented Nov. 4, 1913.

2 SHEETS-SHEET 2.

WITNESSES. INVENTORS fljww M .f. c J" M 6W Wavy/ L A T-TORNE Y.

UNITED STATFi FATENT @FFIQE.

LYMAN MELVIN JONES AND ROBERT HENRY VERITY, OF TORONTU, ONTARIO, CANADA,ASSIGNOES T MASSEY-HARRIS 00., LTD, OF TORONTO, CANADA.

LIFTING DEVICE OF MOWER CUTTER-BARS.

Specification of Letters Patent.

Fatented Nov. 4, 1913.

App1ication filed September 20, 1369. Serial No. 518,631.

. JONES, president of the Massey-Harris Company, and ROBERT H. VERITY,superintendent of the said company, both of the city of Toronto, in theProvince of Ontario, Canada, have invented certain new and usefulImprovements in Lifting Devices of Mower Cutter-Bars, of which thefollowing is a specification.

This invention relates to improvements in the devices employed in mowersto raise and lower the cutter bar.

The device on which this present invention is an improvement comprises achain attached to the cutter bar and to a pivoted quadrant lever adaptedto be rocked either by hand lever or a foot lever.

to rock forward to a limited extent and with it the quadrant lever andchain. Formerly .when no yielding stop was employed the chain of thequadrant lever had to be of suflicient length to allow of the extremedrop of the cutter bar and to take up this extra length of chain thequadrant lever required to be made with the face on which the chain 35 vThe hand lever also had to stand so far forwas taken up of a decidedconvex curve.

ward when the required amount of chain .was given to enable the cutterbar to drop ing resistance of the stop less chain is required and we aretherefore enabled to make the winding face of the quadrant leversubstantially straight which makes the lifting operation easier as theleverage of the quadrant is most effectual when the power of theoperator is least advantageously applied and vice versa.

We are also enabled to set the hand lever so that when the cutter bar isin its normal lowered position it is easily reached and only occupies afar forward position when the cutter bar drops to an abnormal extent.

Figure 1 is a side elevation of a lifting device constructed inaccordance with our invention, the parts being in normal position. Fig.2 is an end view of the same, partly in section. Fig. 3, is a viewsimilar to Fig. 1, showing the quadrant lever rocked by the foot lever.Fig. 4 is a view similar to Fig. 2 with the parts in the position shownin Fig. 3. Fig. 5 is a view similar to Fig. 8 showing the quadrant leverfurther rocked by a movement of the hand lever. Fig. 6 is a plan View,partly in section, showing the parts in normal position. Fig. 7 is aview similar to Fig. 1, looking at the other side. In the drawings likeletters of reference indicate corresponding parts in the differentfigures.

The lifting device in its main features is old in the art, but itsconstruction and mode of operation must be described to renderdescription of the novel features rightly understandable.

A is the tongue of a mower. B is a quadrant lever fulcrumed thereon.Secured to the" upper part of this quadrant lever is a chain 0 which isintended for connection with the cutter bar of the mower. The op erativeface of the quadrant lever is grooved to engage the chain. (See Figs. 2and 6.) By the rocking of the lever B a pull may be imparted to thechain to move the parts to which it is connected. The quadrant lever Bis provided with a foot lever D and also with a hand lever E, whichoperates as hereinafter described. A retaining quadrant F is provided bymeans of which the lever E may be held as adjusted. A spring G is alsoprovided connected at one end to the quadrant lever Band at the other tothe tongue or other suitable part of the frame. This spring tends tocounterbalance the weight of parts to which the chain C is connected.

The construction by which we arrange that the quadrant lever may beoperated either by hand or foot is as follows :The hand lever has ahollow boss H formed thereon. In the lever and in this boss is suitablyguided a notched slide I. Within the boss is a coil spring 0 whichnormally tends to press the slide toward the left as shown in Figs. 2and 4 of the drawings. On the notched retaining quadrant F is formed acam face J against which the spring 0 presses the notched slide I. Thequadrant tween the shoulders a and b is adapted to work through thenotch h in the slide I. When the hand lever H is pushed to its forwardposition the slide I rides upon the high part 2' of the cam J and thenotch in the slide is thus brought into a position to enable the part ofthe quadrant lever between a and b to play through it (see Figs. 1, 2and 6) and the quadrant may be rocked by the foot lever to the positionshown in Fig, 3. A further lift to the quadrant lever may then beimparted by drawing the hand lever backward' whereupon the slide I ridesdown the cam J being pressed by the spring h d the unn t h p rt n o he ld i brought into the path of the shoulder b with which it engages, whichshoulder has of course been brought to the rear of the slide Iby theprevious operation of the foot lever (see Figs. 3, {l ande The cutterbar may now be raised to its limit by the further drawing back of thelever E and held raised y e gaging the ca ch d b hin he houlder on thequadrant F as shown in Fig. 5.

When the parts are in the position shown in Figs. 1 and 2 the firstrocking movement to t q a n l ver al y e mpart by the hand lever, as theshoulder ais then in contact with the part 7' of the hand lever a h w enhe p rts are i h P sition shown in Fig. 7 the spring actuated latchd onthe hand lever E lies in a notch formed at the front of the retainingquadrant h. The forward side of this notch, ho ve in te o bells f d ammovable part integral with the quadrant is formed by a yielding springpressed stop comprising a plunger K sliding in a cast ins 'Lrpr ftra t negra th he htaining quadrant. This plunger is formed with a stem c whichextends out through the casing and may have a pin f passed thr ugh i olimit he forwa d. m em n of th t m under h ac ion at th @9 pring 9 hithga e -t e p unger a d the and of the asing L, Wheh th par s ar i the psit n hvh n ie- 1 of the d awgs. he qu r lev r B ha -Qckedeuffic'ientlyfar forward to enable the cutter bar to assume its normal cuttingposition. I o ev a depre on is cou er by the machine which necessitatesa further drop of the cutter bar the weight of the parts connected tothe chain G is suflicient to r h quadrant l e B and t n lever g n h e ceofier by he spring actuated stop or plunger K, the part moving throughtheniotch It in the slide I and a sufiicieht amount of chain is thusgiven to meet the requirements of the case. Except under these abnormalconditions the hand lever stands in a position sufliciently near thevertical to be within convenient reach of the operators hand.

As only a suflicient amount of chain is needed to reach from thequadrant lever to its connections on the cutter bar without any slackthe convex face ordinarily employed on the quadrant lever may bedispensed with as there is less chain to be gathered up and it is foundthat by making t chain ga ing at Qt the 'qi dt lever substantiallystraight as shown it becomes considerably easier to ligft the cutterb ro ng to h effectiven ss o th l tterage obtained,

W d o d ire, Qt hearse, t imit 9hrselves to the exact arrangement of theyi ding spring pressed stop which tends limit the forward rock of thequadrant lever, as ether a gement migh be devised Wh o d a wer h 'ptpose of ur iflWWiQQ What we claim as our invention is;

n lifting devise r hQwh cu b r h em iheti h Q quad a t leve fulcrumed onth f ame a he a hine; I ch in s cured o he aid q a ant ev for connectionto a mowercutter bar; a y e i sp ing Pr ss-e stop hpph tedfr the frameof the machine and determining h no l down ard swing f the quadant levernd? part co ted W th sai qu dr e er and adapted t enga e sai topi 2- Ina lifti g devic fo mhwer utte bar he c m inat on 9f 2 q adrant litte r md a hs fram 9 the ma h fies a hand lever adapt o oper e sa quada t r; nda re n n qu dr n fe e hand l r p o ded with a y eldih Spr ng pres ed pupp rt d f o th a e of he mac he a d im ng th 1 9. m'a-l forwa d mh mt Qhe h nd ltr llf;

3- In a lift g de ce or mower cr te bars the .t mhih tie of a qu dra hie fu c u e n t e fram of he m chine an h i g a ubs an ia ly str gh ainenga has fa e; a chain et ed. to sa qhadrhh lev for qhne tion th a moveutt r at; and a yielding spring pressed stop supp te from he f ame o thma he dete m he n rm l d wn ard. swi of he qua mht leve ha hi t de ce fomowe u t bars the combination of a quadrant lever ul rumed (511 theframe of h machin n machine; a hand lever pivoted on the same fulcrum; anotched slide suitably guided in the hand lever transverse of thequadrant lever; a part on the quadrant lever adapted to work through thenotch, a shoulder being formed thereon; a spring normally tend ing topress the slide endwise to bring its unnotched portion into the path ofthe shoulder of the quadrant lever; a retaining quadrant for the handlever mounted on the frame; a stationary cam on said retaining quadrantwith which the said slide engages so that it is given an endwise motionas the hand lever is rocked; and a yielding spring pressed stopsupported from the 15 frame of the machine and limiting the normalforward movement of the hand lever.

Toronto, this 10 day of September, 1909.

LYMAN MELVIN JONES. ROBERT HENRY VERITY.

Signed in the presence of FREDERICK HOWARD MoLEAN, HAROLD BLANCHARDBEDSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

